Power conversion unit

Abstract

A power conversion unit is provided with a power conversion module performing conversion between direct current power and alternating current power, a first bus bar connected to the power conversion module and inputting and outputting the power, a chassis housing the power conversion module, and a terminal connecting the first bus bar and a second bus bar connected to an external device. The terminal and at least a part of the chassis are integrally formed of a resin.

The invention claimed is: 
     
       1. A power conversion unit comprising:
 a power conversion module configured to perform conversion between direct current power and alternating current power; 
 a first bus bar connected to the power conversion module and configured to input and output the power converted by the power conversion module; 
 a second bus bar configured to be connected to an external device; 
 a chassis housing the power conversion module; 
 a terminal portion extending from part of the chassis, wherein the terminal portion and said part of the chassis are integrally formed of a resin; and 
 a fastener that fastens the first and second bus bars to the terminal portion such that the first and second bus bars are sandwiched between the terminal portion and a head of the fastener. 
 
     
     
       2. The power conversion unit according to  claim 1 , wherein the terminal portion is provided outside the chassis. 
     
     
       3. The power conversion unit according to  claim 2 , wherein the terminal portion is housed inside a recessed portion provided in the external device. 
     
     
       4. The power conversion unit according to  claim 1 , further comprising:
 a first set of two or more bus bars connected to the power conversion module, the first set including the first bus bar; 
 a second set of two or more bus bars connected to the first set of two or more bus bars, the second set including the second bus bar; and 
 a wall portion integrally formed of the resin with the terminal portion and the at least a part of the chassis and insulating between two bus bars in the first set and between two bus bars in the second set. 
 
     
     
       5. The power conversion unit according to  claim 1 , wherein a flow path through which a refrigerant flows is formed inside the chassis and the terminal portion. 
     
     
       6. The power conversion unit according to  claim 1 , wherein;
 a flow path through which a refrigerant flows is formed inside the chassis, and 
 the flow path is extended to a vicinity of the terminal portion. 
 
     
     
       7. The power conversion unit according to  claim 6 , wherein:
 the terminal portion has a metal body inside, and 
 the metal body reaches the flow path. 
 
     
     
       8. The power conversion unit according to  claim 1 , wherein the second bus bar extends through the resin of the chassis from inside the chassis to outside the chassis.